noteflow

NoteFlow Studio — a web-based music IDE and synthesizer. Compose multi-track songs in simple text notation, play via QWERTY or MIDI keyboard, record performances, and co-write with an AI assistant. Realistic Web Audio instrument modeling: piano, organ, flute, violin, cello, and drums. Built with React, TypeScript, and Vite. Maintained by seehiong on GitHub, where it has earned 131 stars from the community.

It's actively developed around ai-music, interactive, learn-to-play, and is a solid reference for anyone building with these tools.